/* Classroom randomiser (random-picker.php). Loaded after pdf-tools.css so the hero, option
   fields, segments and privacy note are shared; the tab strip mirrors grade-calculator.css.
   Adds the shared name-list column, the canvas wheel, pick stage, group cards, order list and
   a full-screen "projector" mode that scales everything up. */
.rp-hero:before{content:"PICK"}
.rp-app{padding-top:56px;background:linear-gradient(180deg,#f6f8fb 0%,#fff 260px)}
.rp-app [hidden]{display:none!important}
.rp-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:28px}
.rp-tabs .ct-tab{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:14px;align-items:center;text-align:left;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;cursor:pointer;color:var(--navy);transition:.2s var(--ease)}
.rp-tabs .ct-tab .icon{grid-row:1/3;width:30px;height:30px;color:var(--blue)}
.rp-tabs .ct-tab span{font-weight:700;font-size:1rem;letter-spacing:-.01em}
.rp-tabs .ct-tab small{font-size:.74rem;color:#687482}
.rp-tabs .ct-tab:hover{border-color:var(--blue);transform:translateY(-2px);box-shadow:0 1px 2px rgba(7,20,42,.07),0 12px 28px rgba(11,37,69,.08)}
.rp-tabs .ct-tab[aria-selected="true"]{background:linear-gradient(135deg,#0b2545,#1e4a7d);border-color:transparent;color:#fff;box-shadow:0 1px 2px rgba(7,20,42,.07),0 16px 34px rgba(11,37,69,.22)}
.rp-tabs .ct-tab[aria-selected="true"] .icon{color:var(--brand-pink-tint)}
.rp-tabs .ct-tab[aria-selected="true"] small{color:#c9d7e5}
.rp-body{display:grid;grid-template-columns:340px minmax(0,1fr);gap:28px;align-items:start}
.rp-main{min-width:0;display:flex;flex-direction:column;gap:12px}
.rp-panel{display:flex;flex-direction:column;gap:16px}
.rp-help{margin:-4px 0 0;font-size:.84rem;color:#4e5e72;line-height:1.6}
.ct-mini-btn{background:#fff;border:1px solid var(--line)!important;color:var(--navy);border-radius:999px;padding:9px 16px;font-size:.84rem;gap:8px;align-self:flex-start;white-space:nowrap}
.ct-mini-btn .icon{width:16px;height:16px}
.ct-mini-btn:disabled{opacity:.45;cursor:not-allowed}
.rp-toolbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.rp-toolbar .ct-bt-count{margin-left:auto;font:700 .74rem Manrope,sans-serif;color:#687482;letter-spacing:.04em}
.rp-icon-btn{width:36px;height:36px;padding:0;border-radius:8px;background:#fff;border:1px solid var(--line);color:var(--navy);display:inline-grid;place-items:center;flex:none}
.rp-icon-btn .icon{width:18px;height:18px}
.rp-icon-btn:hover{border-color:var(--blue);color:var(--blue)}
.rp-icon-btn:disabled{opacity:.4;cursor:not-allowed}
.rp-icon-btn[aria-pressed="false"]{opacity:.5;text-decoration:line-through}
.rp-go{border-radius:8px;padding:12px 20px;gap:8px;font-size:.92rem}
.rp-go .icon{width:18px;height:18px}
.rp-go:disabled{opacity:.5;cursor:not-allowed}
.rp-inline-field{flex-direction:row!important;align-items:center;gap:10px!important}
.rp-inline-field>span{white-space:nowrap}
.rp-inline-field input{width:84px;text-align:center;font-variant-numeric:tabular-nums}
.rp-check{display:inline-flex;align-items:center;gap:8px;font-size:.82rem;color:#4e5e72;cursor:pointer;white-space:nowrap}
.rp-check input{width:16px;height:16px;accent-color:var(--blue)}

/* ---- shared name list column ---- */
.rp-side{position:sticky;top:96px}
.rp-list-card{gap:12px}
.rp-list-head{display:flex;align-items:center;justify-content:space-between}
.rp-list-head h3{margin:0;font-size:1.05rem}
.rp-list-head .ct-bt-count{font:800 .78rem Manrope,sans-serif;color:var(--blue);background:#e9f1fb;border-radius:999px;padding:4px 11px;letter-spacing:.04em}
.rp-saved-row{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:6px}
.rp-saved-row select{border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:.86rem;color:var(--ink);background:#fff;min-width:0}
.rp-names-field textarea{min-height:260px;font-size:.9rem;line-height:1.55;resize:vertical;font-family:inherit}
.rp-list-tools{display:flex;flex-direction:column;gap:10px}
.rp-range{display:flex;align-items:center;gap:8px;font-size:.82rem;color:#4e5e72}
.rp-range input{width:72px;border:1px solid var(--line);border-radius:8px;padding:8px 6px;text-align:center;font-size:.88rem;color:var(--ink);background:#fff}
.rp-range .ct-mini-btn{padding:8px 14px}
.rp-list-actions{display:flex;flex-wrap:wrap;gap:6px}
.rp-list-actions .ct-mini-btn{padding:7px 12px;font-size:.78rem}
.rp-list-card .pdft-privacy{margin-top:2px}

/* ---- stage (shared chrome for all four panels) ---- */
.rp-stage{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:0 1px 2px rgba(7,20,42,.07),0 18px 44px rgba(11,37,69,.08)}
.rp-stage-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.rp-stage-title{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:1.05rem;letter-spacing:-.01em}
.rp-stage-title .icon{width:22px;height:22px;color:var(--blue)}
.rp-stage-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rp-subhead{font-size:.78rem;font-family:Manrope,sans-serif;letter-spacing:.1em;text-transform:uppercase;color:#687482;margin:0}
.rp-history-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:6px}
.rp-history{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;max-height:220px;overflow:auto;font-size:.86rem}
.rp-history li{display:flex;align-items:center;gap:10px;padding:6px 10px;border-radius:8px;background:#f6f8fb;color:var(--ink)}
.rp-history li b{font:800 .72rem Manrope,sans-serif;color:var(--blue);min-width:22px}
.rp-history li:first-child{background:#e9f1fb;font-weight:600}
.rp-history-wrap{flex-direction:row;flex-wrap:wrap;max-height:none}
.rp-history-wrap li{padding:5px 10px 5px 8px}
.rp-empty{margin:0;text-align:center;color:#8794a5;font-size:.9rem;padding:38px 10px}
.rp-pool{margin:0;font-size:.76rem;color:#687482}
.rp-pool.is-error{color:#c0263a}
#rp-msg{min-height:1.2em}

/* ---- wheel ---- */
.rp-wheel-wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(220px,.85fr);gap:24px;align-items:center}
.rp-wheel-box{position:relative;width:100%;max-width:560px;margin:0 auto;aspect-ratio:1;user-select:none}
.rp-wheel-box canvas{width:100%;height:100%;display:block;border-radius:50%;box-shadow:0 20px 50px rgba(11,37,69,.18),0 0 0 8px #fff,0 0 0 9px var(--line)}
.rp-pointer{position:absolute;top:-6px;left:50%;transform:translateX(-50%);width:0;height:0;border-left:16px solid transparent;border-right:16px solid transparent;border-top:36px solid #c8306f;filter:drop-shadow(0 4px 6px rgba(0,0,0,.25));z-index:2}
.rp-pointer:after{content:"";position:absolute;top:-40px;left:-6px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid #c8306f;box-sizing:border-box}
.rp-spin{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:22%;aspect-ratio:1;border-radius:50%;border:0;background:linear-gradient(135deg,#0b2545,#1e4a7d);color:#fff;font:800 clamp(.8rem,2.6vw,1.2rem) Manrope,sans-serif;letter-spacing:.08em;cursor:pointer;box-shadow:0 10px 26px rgba(11,37,69,.35),0 0 0 6px #fff;transition:transform .2s var(--ease),box-shadow .2s;z-index:2}
.rp-spin:hover{transform:translate(-50%,-50%) scale(1.06);box-shadow:0 14px 32px rgba(11,37,69,.45),0 0 0 6px #fff}
.rp-spin:disabled{cursor:progress;opacity:.9}
.rp-spin:focus-visible{outline:3px solid var(--brand-pink-tint);outline-offset:4px}
.rp-wheel-box.is-empty canvas{opacity:.35}
.rp-wheel-side{display:flex;flex-direction:column;gap:10px;min-width:0}
.rp-winner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;padding:18px 14px;border-radius:14px;background:linear-gradient(180deg,#f6f8fb,#fff);border:1px solid var(--line)}
.rp-winner-label{font:700 .72rem Manrope,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:#687482}
.rp-winner strong{font:800 clamp(1.6rem,3.4vw,2.6rem)/1.15 "IBM Plex Sans Thai",sans-serif;letter-spacing:-.02em;color:var(--navy);overflow-wrap:anywhere;transition:transform .3s var(--ease)}
.rp-winner.is-hit strong{color:#c8306f;animation:rp-pop .5s var(--ease)}
.rp-winner-sub{font-size:.78rem;color:#687482}
@keyframes rp-pop{0%{transform:scale(.6);opacity:0}60%{transform:scale(1.12)}100%{transform:scale(1);opacity:1}}

/* ---- pick ---- */
.rp-pick-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.rp-pick-controls .ct-bt-count{margin-left:auto;font:700 .74rem Manrope,sans-serif;color:#687482;letter-spacing:.04em}
.rp-pick-stage{position:relative;overflow:hidden;min-height:200px;display:flex;flex-wrap:wrap;justify-content:center;align-content:center;gap:14px;padding:22px;border-radius:14px;background:linear-gradient(180deg,#f6f8fb,#fff);border:1px solid var(--line)}
.rp-pick-card{display:flex;flex-direction:column;align-items:center;gap:6px;min-width:160px;max-width:100%;padding:18px 24px;border-radius:14px;background:#fff;border:1px solid var(--line);box-shadow:0 1px 2px rgba(7,20,42,.07),0 10px 26px rgba(11,37,69,.1);animation:rp-pop .5s var(--ease) both}
.rp-pick-card b{font:800 .7rem Manrope,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:#687482}
.rp-pick-card strong{font:800 clamp(1.4rem,3vw,2.2rem)/1.15 "IBM Plex Sans Thai",sans-serif;color:var(--navy);text-align:center;overflow-wrap:anywhere}
.rp-pick-stage.is-rolling .rp-pick-card{animation:none}
.rp-pick-stage.is-rolling .rp-pick-card strong{color:#8794a5}
.rp-pick-stage.is-done .rp-pick-card strong{color:#c8306f}

/* ---- groups ---- */
.rp-group-options{gap:12px}
.rp-group-mode{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center}
.rp-group-options textarea{min-height:56px;resize:vertical;font-family:inherit}
.rp-groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.rp-group{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 1px 2px rgba(7,20,42,.07),0 8px 22px rgba(11,37,69,.06);animation:rp-pop .45s var(--ease) both;animation-delay:var(--d,0ms)}
.rp-group-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 14px;background:var(--gc,#2f6fb0);color:#fff;font-weight:800;font-size:.95rem}
.rp-group-head small{font:700 .7rem Manrope,sans-serif;letter-spacing:.06em;opacity:.85;background:rgba(255,255,255,.18);padding:2px 8px;border-radius:999px}
.rp-group ol{list-style:none;margin:0;padding:8px 6px;display:flex;flex-direction:column;gap:2px}
.rp-group li{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:4px;font-size:.9rem;color:var(--ink)}
.rp-group li:nth-child(2n){background:#f6f8fb}
.rp-group li b{font:800 .7rem Manrope,sans-serif;color:#8794a5;min-width:18px;text-align:right}

/* ---- order ---- */
.rp-order{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px;counter-reset:rp}
.rp-order li{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:8px;background:#f6f8fb;border:1px solid transparent;font-size:.95rem;color:var(--ink);animation:rp-pop .4s var(--ease) both;animation-delay:var(--d,0ms)}
.rp-order li b{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#0b2545,#1e4a7d);color:#fff;font:800 .9rem Manrope,sans-serif;flex:none}
.rp-order li:first-child{background:#fff6dc;border-color:#f1d98a}
.rp-order li:first-child b{background:linear-gradient(135deg,#d98a1a,#b7791f)}

/* ---- full-screen / projector mode ---- */
.rp-stage:fullscreen{border-radius:0;border:0;padding:4vh 5vw;overflow:auto;background:#fff;font-size:1.25rem}
.rp-stage:fullscreen .rp-wheel-wrap{grid-template-columns:minmax(0,1fr) minmax(320px,.6fr);height:100%}
.rp-stage:fullscreen .rp-wheel-box{max-width:min(80vh,720px)}
.rp-stage:fullscreen .rp-winner strong{font-size:clamp(2.6rem,6vw,5rem)}
.rp-stage:fullscreen .rp-history{max-height:38vh;font-size:1.05rem}
.rp-stage:fullscreen .rp-pick-stage{min-height:55vh;gap:24px}
.rp-stage:fullscreen .rp-pick-card{min-width:260px;padding:30px 44px}
.rp-stage:fullscreen .rp-pick-card strong{font-size:clamp(2.4rem,5vw,4.4rem)}
.rp-stage:fullscreen .rp-groups{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.rp-stage:fullscreen .rp-group-head{font-size:1.3rem;padding:14px 18px}
.rp-stage:fullscreen .rp-group li{font-size:1.3rem;padding:8px 12px}
.rp-stage:fullscreen .rp-order{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}
.rp-stage:fullscreen .rp-order li{font-size:1.5rem;padding:14px 18px}
.rp-stage:fullscreen .rp-order li b{width:46px;height:46px;font-size:1.2rem}
.rp-stage:fullscreen .rp-group-options,.rp-stage:fullscreen .rp-help,.rp-stage:fullscreen .rp-order-tools .ct-mini-btn{display:none}
.rp-stage:fullscreen .rp-order-tools{justify-content:center}

@media(max-width:1000px){.rp-body{grid-template-columns:1fr}.rp-side{position:static}.rp-names-field textarea{min-height:160px}.rp-tabs{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){
  .rp-app{padding-top:36px}.rp-tabs{grid-template-columns:1fr;gap:8px}.rp-tabs .ct-tab{padding:12px 14px}
  .rp-stage{padding:16px}
  .rp-wheel-wrap{grid-template-columns:1fr}
  .rp-group-mode{grid-template-columns:1fr}
  .rp-pick-controls .ct-bt-count{margin-left:0;width:100%}
  .rp-saved-row{grid-template-columns:minmax(0,1fr) auto auto}
}

/* ---- print: only the result of the active mode ---- */
@media print{
  .site-header,.site-footer,.pdft-hero,.rp-tabs,.rp-side,.pdft-faq,.rp-stage-bar,.rp-group-options,.rp-order-tools,.rp-help,#rp-msg,.pdft-privacy{display:none!important}
  .rp-app{padding:0;background:none}
  .rp-stage{box-shadow:none;border:0;padding:0}
  .rp-group,.rp-order li{break-inside:avoid;animation:none;box-shadow:none}
  .rp-group-head{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}

/* ---- dark mode ---- */
[data-theme="dark"] .rp-app{background:linear-gradient(180deg,var(--dm-surface) 0%,var(--dm-bg) 260px)}
[data-theme="dark"] .rp-tabs .ct-tab,[data-theme="dark"] .rp-stage,[data-theme="dark"] .ct-mini-btn,[data-theme="dark"] .rp-icon-btn,[data-theme="dark"] .rp-saved-row select,[data-theme="dark"] .rp-range input,[data-theme="dark"] .rp-pick-card,[data-theme="dark"] .rp-group{background:var(--dm-surface);border-color:var(--dm-border);color:var(--dm-text)}
[data-theme="dark"] .rp-tabs .ct-tab[aria-selected="true"]{background:linear-gradient(135deg,#1e4a7d,#0b2545);color:#fff}
[data-theme="dark"] .rp-tabs .ct-tab small,[data-theme="dark"] .rp-help,[data-theme="dark"] .rp-subhead,[data-theme="dark"] .rp-winner-label,[data-theme="dark"] .rp-winner-sub,[data-theme="dark"] .rp-pool,[data-theme="dark"] .rp-empty,[data-theme="dark"] .rp-check,[data-theme="dark"] .rp-range,[data-theme="dark"] .rp-pick-card b,[data-theme="dark"] .rp-pick-controls .ct-bt-count,[data-theme="dark"] .rp-toolbar .ct-bt-count{color:var(--dm-text-muted)}
[data-theme="dark"] .rp-stage-title,[data-theme="dark"] .rp-winner strong,[data-theme="dark"] .rp-pick-card strong,[data-theme="dark"] .rp-list-head h3{color:var(--dm-text)}
[data-theme="dark"] .rp-winner.is-hit strong,[data-theme="dark"] .rp-pick-stage.is-done .rp-pick-card strong{color:#ff9ccb}
[data-theme="dark"] .rp-winner,[data-theme="dark"] .rp-pick-stage{background:linear-gradient(180deg,var(--dm-surface-2),var(--dm-surface));border-color:var(--dm-border)}
[data-theme="dark"] .rp-history li,[data-theme="dark"] .rp-order li,[data-theme="dark"] .rp-group li:nth-child(2n){background:var(--dm-surface-2);color:var(--dm-text)}
[data-theme="dark"] .rp-history li:first-child{background:rgba(47,111,176,.25)}
[data-theme="dark"] .rp-group li{color:var(--dm-text)}
[data-theme="dark"] .rp-order li:first-child{background:#3a2e0d;border-color:#6d571f}
[data-theme="dark"] .rp-list-head .ct-bt-count{background:rgba(47,111,176,.2);color:#8fc1ea}
[data-theme="dark"] .rp-wheel-box canvas{box-shadow:0 20px 50px rgba(0,0,0,.4),0 0 0 8px var(--dm-surface),0 0 0 9px var(--dm-border)}
[data-theme="dark"] .rp-spin{box-shadow:0 10px 26px rgba(0,0,0,.5),0 0 0 6px var(--dm-surface)}
[data-theme="dark"] .rp-stage:fullscreen{background:var(--dm-bg)}